MAX9989EVKIT Maxim Integrated Products, MAX9989EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX9989EVKIT
• Description: EVAL KIT FOR MAX9989
• Manufacturer: Maxim Integrated Products
• Type: LO Bufferr

Specifications of MAX9989EVKIT

• Frequency: 700MHz ~ 1.1GHz
• For Use With/related Products: MAX9989
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MAX9989/MAX9990 Evaluation Kits
The MAX9987/MAX9988 EV kits are fully assembled and
factory tested. Follow the instructions in the Connections
and Setup section for proper device evaluation.
Table 1 lists the equipment required to verify the opera-
tion of the MAX9989/MAX9990 EV kits. It is intended as
a guide only, and some substitutions are possible.
This section provides a step-by-step guide to testing
the basic functionality of the EV kits. As a general pre-
caution to prevent damaging the outputs by driving
high-VSWR loads, do not turn on DC power or the RF
signal generator until all connections are made:
1) Calibrate the power meter at 900MHz for the
2) Connect a 20dB pad to the LO driver output
3) Connect a 50Ω termination to OUTPLL.
4) For the MAX9989, set the RF signal generator for
5) Connect the power sensor to OUTLO’s 20dB pad.
6) Set the DC supply to +5.0V (set the current limit to
7) Enable the supply.
8) Enable the RF signal generator’s output.
2
MAX9989, or at 1800MHz for the MAX9990. Be sure
to use a power sensor rated to at least 20dBm.
Measure the loss of the 20dB attenuator (pad) that is
connected to OUTLO; account for this loss as an off-
set in the power meter.
(OUTLO). The 20dB pad maintains a reasonable
load VSWR for the output drivers and protects the
RF equipment from accidental overload.
900MHz CW (i.e., unmodulated) at +10dBm
(accounts for 3dB loss of input pad); for the
MAX9990, set the generator for 1800MHz at
+12dBm. Connect the generator to the EV kit input
through a 3dB pad. Disable the RF output until all
connections are made.
around 250mA, if possible). Disable the output volt-
age and connect the supply to the EV kit through the
ammeter.
_______________________________________________________________________________________
Test Equipment Required
Connections and Setup
Quick Start
1) From the procedure above, the power meter should
2) Ensure that the supply current is not more than
3) Leaving the 20dB power pad connected to OUTLO,
4) After testing, disable the RF generator, disconnect
A properly designed PC board is an essential part of
any RF/microwave circuit. Keep RF signal lines as short
as possible to reduce losses, radiation, and induc-
tance. For best performance, route the ground pin
traces directly to the exposed paddle underneath the
package. This paddle should be connected to the
ground plane of the board by using multiple vias under
the device to provide the best RF/thermal conduction
path. Solder the exposed paddle, on the bottom of the
device package, to a PC board exposed pad.
Table 1. List of Required Equipment
HP E3631A
Fluke 75 series II
HP/Agilent 8648B
HP 437B
HP 8482A
20dB pad
3dB pad
50Ω termination
be reading a power of about +17dBm. Keep in mind
that because of a 2nd harmonic component in the
output, these measured results are slightly higher
than the true on-frequency RF power.
122mA at V
move the power detector to OUTPLL (removing the
50Ω termination) and verify an output level of about
+3dBm. Be sure to turn off the 20dB offset.
the supply, then disconnect the RF cables.
EQUIPMENT
CC
= 5.25V and P
QTY
1
1
1
1
1
1
1
1
DC power supply
Digital multimeter
RF signal generator
RF power meter
High-power sensor (power head)
20dB (1W) attenuator
3dB attenuator
50Ω (1W) termination
Layout Considerations
Testing the Buffer
IN
DESCRIPTION
= +10dBm.